noun
a person or thing that equalizes, especially a device used to adjust sound frequencies to achieve a balance in audio output
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The equalizer in the audio system ensures that all frequencies are balanced.
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Make sure to adjust the equalizer on the stereo for the best sound quality.
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I always mess around with the equalizer on my music player to get the bass just right.
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Education is often seen as the great equalizer in society, providing opportunities for all.